[单项选择]
Thanks to the introduction of new drugs, many of the early problems in organ transplants, such as tissue rejection, have, to a great extent, now been solved. However, there remains a major problem. The people in need of transplant surgery far outnumber the available organs.
Many countries, such as Britain, have huge waiting lists of people whose lives could be saved by being given a kidney, lung, heart, or liver transplant. Sadly, many of them die before they reach the top of those lists.
Under the present British policy, people are asked to carry donor (捐赠人) cards, and/or put their names on the national donor register. Thus, if they lose their lives suddenly, for example, in a traffic accident, they have given permission in advance of their deaths for their organs to be used. If they have not done so, surgeons are faced with the task of asking the grieved relatives for permission to use the organs of the dead. Of course, often the relatives are too upset even to
A. the shortage of qualified doctors
B. the lack of transplant organs
C. tissue rejection
D. immature techniques

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[单项选择]

Thanks to the introduction of new drugs, many of the early problems in organ transplants, such as tissue rejection, have, to a great extent, now been solved. However, there remains a major problem. The people in need of transplant surgery far outnumber the available organs.
Many countries, such as Britain, have huge waiting lists of people whose lives could be saved by being given a kidney, lung, heart, or liver transplant. Sadly, many of them die before they reach the top of those lists.
Under the present British policy, people are asked to carry donor (捐赠人) cards, and/or put their names on the national donor register. Thus, if they lose their lives suddenly, for example, in a traffic accident, they have given permission in advance of their deaths for their organs to be used. If they have not done so, surgeons are faced with the task of asking the grieved relatives for permission to use the organs of the dead. Of course, often the relatives are too upset even to
A. people who die in fatal accidents
B. criminals who are sentenced to death
C. patients who die from serious diseases
D. people who are mentally healthy